Attributes Tables

Files with names of the form *.atb are attributes tables, and with names of
the form *.ati are attributes subtables. They are used when BRLTTY is
displaying screen attributes rather than screen content. Each of the eight
braille dots represents one of the eight VGA attribute bits.

An attributes table consists of a sequence of directives, one per line, which
define how combinations of VGA attributes are to be represented in braille.
UTF-8 character encoding must be used. Whitespace (blanks, tabs) at the
beginning of a line, as well as before and/or after any operand of any
directive, is ignored. Lines containing only whitespace are ignored. If the
first non-whitespace character of a line is # then that line is a comment
and is ignored.

Use this directive to include the content of another file. It is recursive,
which means that an included file can itself include yet another file.
Care must be taken to ensure that an "include loop" is not created.

file

The file to be included. It may be either a relative or an absolute path. If
relative, it is anchored at the directory containing the including file.